A Fluorinated Metal-Organic Framework, FMOF-2, for Preferential Adsorption of Ethane over Ethylene

초록

The preferential adsorption of ethane over ethylene would significantly simplify the overall ethane-ethylene separation scheme for ethylene purification. Ethane-selective adsorbents are still lacking compared to ethylene-selective adsorbents. We discovered that a fluorinated Metal-Organic Framework, FMOF-2, exhibits preferential adsorption of ethane over ethylene at pressures in the range of 40 kPa with ideal adsorbed solution theory selectivity of 3.3. The material was characterized by X-ray diffraction, argon physisorption at 87 K, thermal gravimetric analysis, scanning electron microscope (SEM) image, and X-ray photoelectron analysis. Exposed fluorine functional groups on a porous material produced via a hydrogen-bonding type electrostatic attraction are thought to serve as ethane adsorption sites.

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